ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
OPTIMIZING THE RISK ASSESSMENT FOR THE APPLE SAWFLY HOPLOCAMPA TESTUDINEA KLUG (HYMENOPTERA, TENTHREDINIDAE) |
| Authors: | B. Graf, H. Höhn, H.U. Höpli |
| Abstract:
Computer simulation and field experiments were run to optimize the risk assessment for the apple sawfly Hoplocampa testudinea within the scope of IFP in Switzerland. A soil temperature driven phenology model proved to be a useful tool to determine the optimal time for the installation of white sticky traps. Based on mark-release-recapture experiments the optimal number of traps for a reliable population monitoring was found to be three per variety. Due to the limited range of action of the traps and the low mobility and heterogeneous distribution of the sawflies a maximum distance of 50m between traps is suggested. The relationship between trap catches and infestation level varies between the different cultivars, and hence specific economic injury levels have to be established. | |
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